ASTM E691-22
Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method

Standard No.

ASTM E691-22

Release Date

2022

Published By

American Society for Testing and Materials (ASTM)

Status

Be replaced

Replace By

ASTM E691-23

Latest

ASTM E691-23

Scope

1.1 This practice describes the techniques for planning, conducting, analyzing, and treating the results of an interlaboratory study (ILS) of a test method. The statistical techniques described in this practice provide adequate information for formulating the precision statement of a test method. 1.2 This practice does not concern itself with the development of test methods but rather with gathering the information needed for a test method precision statement after the development stage has been successfully completed. The data obtained in the interlaboratory study may indicate, however, that further effort is needed to improve the test method. 1.3 Since the primary purpose of this practice is the development of the information needed for a precision statement, the experimental design in this practice may not be optimum for evaluating materials, apparatus, or individual laboratories. 1.4 Field of Application—This practice is concerned exclusively with test methods which yield a single numerical figure as the test result, although the single figure may be the outcome of a calculation from a set of measurements. 1.4.1 This practice does not cover methods in which the measurement is a categorization; however, for many practical purposes categorical outcomes can be scored, such as zero-one scoring for binary measurements or as integers, ranks for example, for well-ordered categories and then the test result can be defined as an average, or other summary statistic, of several individual scores. 1.5 This standard may involve hazardous materials, operations, and equipment. This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

ASTM E691-22 Referenced Document

• ASTM E1169 Standard Guide for Conducting Ruggedness Tests
• ASTM E1402 Standard Terminology Relating to Sampling
• ASTM E177 Standard Practice for Use of the Terms Precision and Bias in ASTM Test Methods
• ASTM E2282 Standard Guide for Defining the Test Result of a Test Method*， 2023-11-01 Update
• ASTM E29 Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
• ASTM E456 Standard Terminology for Relating to Quality and Statistics

ASTM E691-22 history

• 2023 ASTM E691-23 Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
• 2022 ASTM E691-22 Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
• 2021 ASTM E691-21 Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
• 2020 ASTM E691-20 Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
• 2019 ASTM E691-19e1 Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
• 2019 ASTM E691-19 Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
• 2018 ASTM E691-18 Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
• 2016 ASTM E691-16 Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
• 2015 ASTM E691-15 Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
• 2014 ASTM E691-14 Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
• 2013 ASTM E691-13 Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
• 2012 ASTM E691-12 Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
• 2011 ASTM E691-11 Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
• 2009 ASTM E691-09e1 Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
• 2009 ASTM E691-09 Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
• 2008 ASTM E691-08 Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
• 2005 ASTM E691-05 Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
• 1999 ASTM E691-99 Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method